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netdev: Monitor CQM RSSI level, emit RSSI LOW/HIGH events

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This commit is contained in:
Andrew Zaborowski 2016-12-23 05:38:03 -05:00 committed by Denis Kenzior
parent fbb7a72643
commit c36d0fcfa4
3 changed files with 67 additions and 0 deletions
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3
src/device.c
View File

@ -619,6 +619,9 @@ static void device_netdev_event(struct netdev *netdev, enum netdev_event event,
case NETDEV_EVENT_DISCONNECT_BY_SME:
device_disassociated(device);
break;
case NETDEV_EVENT_RSSI_THRESHOLD_LOW:
case NETDEV_EVENT_RSSI_THRESHOLD_HIGH:
break;
};
}

62
src/netdev.c
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@ -410,6 +410,26 @@ static void netdev_lost_beacon(struct netdev *netdev)
netdev_connect_free(netdev);
}
static void netdev_rssi_threshold(struct netdev *netdev, uint32_t rssi_event)
{
if (!netdev->connected)
return;
if (rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH)
return;
if (netdev->event_filter) {
int event;
event = (rssi_event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) ?
NETDEV_EVENT_RSSI_THRESHOLD_LOW :
NETDEV_EVENT_RSSI_THRESHOLD_HIGH;
netdev->event_filter(netdev, event, netdev->user_data);
}
}
static void netdev_cqm_event(struct l_genl_msg *msg, struct netdev *netdev)
{
struct l_genl_attr attr;
@ -431,6 +451,14 @@ static void netdev_cqm_event(struct l_genl_msg *msg, struct netdev *netdev)
case NL80211_ATTR_CQM_BEACON_LOSS_EVENT:
netdev_lost_beacon(netdev);
break;
case NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT:
if (len != 4)
continue;
netdev_rssi_threshold(netdev,
*(uint32_t *) data);
break;
}
}
@ -1979,6 +2007,29 @@ static void netdev_register_frame(struct netdev *netdev, uint16_t frame_type,
l_genl_family_send(nl80211, msg, NULL, NULL, NULL);
}
static struct l_genl_msg *netdev_build_cmd_set_cqm_rssi(struct netdev *netdev)
{
struct l_genl_msg *msg;
/* -70 dBm is a popular choice for low signal threshold */
int32_t thold = -70;
uint32_t hyst = 5;
msg = l_genl_msg_new_sized(NL80211_CMD_SET_CQM, 128);
l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
l_genl_msg_enter_nested(msg, NL80211_ATTR_CQM);
l_genl_msg_append_attr(msg, NL80211_ATTR_CQM_RSSI_THOLD, 4, &thold);
l_genl_msg_append_attr(msg, NL80211_ATTR_CQM_RSSI_HYST, 4, &hyst);
l_genl_msg_leave_nested(msg);
return msg;
}
static void netdev_cmd_set_cqm_cb(struct l_genl_msg *msg, void *user_data)
{
if (l_genl_msg_get_error(msg) < 0)
l_error("CMD_SET_CQM failed");
}
static void netdev_create_from_genl(struct l_genl_msg *msg)
{
struct l_genl_attr attr;
@ -1993,6 +2044,7 @@ static void netdev_create_from_genl(struct l_genl_msg *msg)
struct ifinfomsg *rtmmsg;
size_t bufsize;
const uint8_t action_neighbor_report_prefix[2] = { 0x05, 0x05 };
struct l_genl_msg *set_cqm_msg;
if (!l_genl_attr_init(&attr, msg))
return;
@ -2108,6 +2160,16 @@ static void netdev_create_from_genl(struct l_genl_msg *msg)
/* Subscribe to Management -> Action -> RM -> Neighbor Report frames */
netdev_register_frame(netdev, 0x00d0, action_neighbor_report_prefix,
sizeof(action_neighbor_report_prefix));
/* Set RSSI threshold for CQM notifications */
set_cqm_msg = netdev_build_cmd_set_cqm_rssi(netdev);
if (!l_genl_family_send(nl80211, set_cqm_msg, netdev_cmd_set_cqm_cb,
NULL, NULL)) {
l_error("CMD_SET_CQM failed");
l_genl_msg_unref(set_cqm_msg);
}
}
static void netdev_get_interface_callback(struct l_genl_msg *msg,

2
src/netdev.h
View File

@ -44,6 +44,8 @@ enum netdev_event {
NETDEV_EVENT_LOST_BEACON,
NETDEV_EVENT_DISCONNECT_BY_AP,
NETDEV_EVENT_DISCONNECT_BY_SME,
NETDEV_EVENT_RSSI_THRESHOLD_LOW,
NETDEV_EVENT_RSSI_THRESHOLD_HIGH,
};
enum netdev_watch_event {